JP6483431B2 - Actuator switching mechanism and caster braking mechanism - Google Patents

Description

  The present invention relates to an operation switching mechanism of an operating device that switches operation of an operating device that performs a mechanical operation such as a brake and a brake mechanism of a caster.

  Generally, in a brake device for casters attached to a body to be attached such as furniture, bedding, or a cart body, a brake device is provided for each caster attached to a corner. A braking device is an actuating device that performs a mechanical operation like a brake. In a conventional caster braking device, the operator operates by rotating the mounting body, or the operator moves around the mounting body and pushes and turns the operating lever of the braking device for each caster or for each pair of front and rear casters. Thus, the braking device is operated (see, for example, Patent Document 1).

JP-A-2005-231606

In the caster carriages to be used in facilities such as hospitals and beauty salon, frequently, such as when to repeat the locking and unlocking of the caster, the work there is a problem that it takes time and effort will be complicated.

The present invention aims to provide a hydraulic diverter structure of the problems which has been made to eliminate, actuating device that can be carried out braking and brake release only in Braking device repeats the pressing operation.

  The operation switching mechanism of the operating device according to claim 1 of the present invention is operated by projecting a part of a switching member for switching operation from the operating device for performing mechanical operation to the outside, and moving the switching member forward and backward. An operation switching mechanism of an operating device for switching the operation of the device, wherein a shaft having an operating portion on a fixed side is pivotally supported to be elastically urged and an operation member having one end attached to the shaft is switched to a switching member When the operation part is pressed and operated by overcoming the bullet urging force by an external force, the shaft is rotated and locked at a predetermined rotation angle, and the operation part is again external force. When the pressing operation is performed, the shaft is unlocked and returned to the original position.

  In the operation switching mechanism of the operating device according to claim 1 of the present invention, a part of the switching member that switches the operation from the operating device that performs the mechanical operation protrudes to the outside, and the switching member moves forward and backward to operate. An operation switching mechanism of an operating device for switching the operation of the device, wherein a shaft having an operating portion on a fixed side is pivotally supported to be elastically urged and an operation member having one end attached to the shaft is switched to a switching member When the operation part is pressed and operated by overcoming the bullet urging force by an external force, the shaft is rotated and locked at a predetermined rotation angle, and the operation part is again external force. The operation of the actuator can be switched on / off simply by repeating the pressing operation of the operation unit by releasing the lock of the shaft and returning to the original position. Is simplified.

  The operation switching mechanism of the operating device according to claim 2 of the present invention operates by causing a part of the switching member for switching the operation to project from the operating device for performing the mechanical operation to the outside and moving the switching member forward and backward. An operation switching mechanism of an operating device for switching the operation of the device, wherein a shaft having an operating portion on a fixed side is pivotally supported to be elastically urged and an operation member having one end attached to the shaft is switched to a switching member A support member that is attached to the fixed side and through which the shaft passes, a swinging member that faces the support member and has one end connected to the shaft and rotating integrally with the shaft, and A locking member is mounted on the swinging end side of the swinging member in parallel with the shaft and is capable of moving forward and backward, and is provided in a swingable manner on the support member, and is provided on the operation member with an external force. Is added, it follows the locking member and swings to engage at a predetermined swing angle. When the member is locked to prevent the return of the locking member and an external force is applied again to the operation portion, the engagement with the locking member is released and the locking member is displaced to the swinging member side to return to the original position. And an engagement / disengagement means for returning to the position.

  In the operation switching mechanism of the operating device according to claim 2 of the present invention, a part of the switching member that switches the operation from the operating device that performs the mechanical operation protrudes to the outside, and the switching member moves forward and backward to operate. An operation switching mechanism of an operating device for switching the operation of the device, wherein a shaft having an operating portion on a fixed side is pivotally supported to be elastically urged and an operation member having one end attached to the shaft is switched to a switching member A support member that is attached to the fixed side and through which the shaft passes, a swinging member that faces the support member and has one end connected to the shaft and rotating integrally with the shaft, and A locking member is mounted on the swinging end side of the swinging member in parallel with the shaft and is capable of moving forward and backward, and is provided in a swingable manner on the support member, and is provided on the operation member with an external force. Is added, it follows the locking member and swings. When the locking member is locked to prevent the locking member from returning and external force is applied again to the operating portion, the engagement with the locking member is released and the locking member is displaced to the swinging member side to restore the original position. The engagement / disengagement means for returning to the position allows the engagement / disengagement means to lock the locking member at a predetermined swing angle or return to the return position only by repeating the pressing operation of the operation unit. The operation of the actuator can be switched on and off, and the operation is simplified.

  The operation switching mechanism of the operating device according to claim 3 of the present invention is configured by a mounted body having a caster having a rotatable wheel on the fixed side attached to the lower surface, and the operating device brakes the wheel of the caster. It is characterized by comprising a braking device.

  According to a fourth aspect of the present invention, there is provided an operation switching mechanism for an operation device, wherein the advance / retreat means is attached to the through hole formed in parallel with the shaft on the swing end side of the swing member so as to be prevented from falling off. And a first spring that is interposed between the pin and the swinging member and elastically biases the pin toward the support member and protrudes, and the engagement / disengagement means swings on the support member. A working plate having one side edge freely slidably contacted with the pin, a continuous plate formed on the one side edge and having a recess for receiving the pin, and the working plate and the fixed side. A second spring interposed between the second spring and elastically urging the action plate toward the pin; and a stopper provided on the support member and abutting against the action plate urged toward the pin to restrict the swing position. The concave part of the action plate is formed by cutting the end of one side edge. An indented portion where the protruding end of the pin is locked, and a receiving end that protrudes outward toward the end of the one side edge, accepts the protruding end of the pin that is detached from the end of the one side edge, Is configured to have a delivery part that guides the pin to the notch, and the action plate is formed continuously from the notch and the pin locked to the notch is operated. When the notched part is disengaged due to displacement in the direction opposite to the shaft biasing direction due to the external force from the part, the projecting end part of this pin is guided to push the pin back to the swinging member side, and the pin is detached to the outside of the action plate It is characterized by having a separation guide path to be made.

  In the operation switching mechanism of the operating device according to claim 5 of the present invention, when the pin is separated from the notched portion, the end surface of the protruding end portion of the pin is placed on the lower floor surface and the pin is placed on the wall surface. And an introduction guide portion that leads from the inclined surface to the step portion, and a guide slope portion that is formed in conformity with the trajectory in the return direction of the pin and continues to the step portion, and that guides the pin to the outside. To do.

  In the caster braking mechanism according to the sixth aspect of the present invention, the turning shafts are pivotally attached to the front and rear sides of the mounted body in the traveling direction, and the wheels are pivotally supported on the main body. A caster, a braking device provided on at least one of the pair of casters on the front and rear sides, and a locking device that displaces the engaging member and detachably engages with a locking portion of the wheel to lock the wheel; A shaft having an operation portion on the body is pivotally supported, and the front and rear sides of the shaft and the engagement member are arranged in the front-rear direction, and the operation member having one end attached to the shaft is used as the engagement member. And a braking operation mechanism that displaces the engaging member by operating the operation portion. When a unidirectional force is applied between the braking devices of the front caster and the rear caster, the force is reversed. Output in the direction and transmit the rotation of one of the shafts reversed to the other shaft In which characterized in that a braking operation transmitting means.

  In the caster braking mechanism according to claim 6 of the present invention, the turning shafts are pivotally attached to the front and rear sides of the mounted body in the traveling direction, and the wheels are pivotally supported on the main body. A caster, a braking device provided on at least one of the pair of casters on the front and rear sides, and a locking device that displaces the engaging member and detachably engages with a locking portion of the wheel to lock the wheel; A shaft having an operation portion on the body is pivotally supported, and the front and rear sides of the shaft and the engagement member are arranged in the front-rear direction, and the operation member having one end attached to the shaft is used as the engagement member. And a braking operation mechanism that displaces the engaging member by operating the operation portion. When a unidirectional force is applied between the braking devices of the front caster and the rear caster, the force is reversed. Output in the direction and transmitted by reversing the rotation of one of the axes to the other axis. By providing the braking operation transmission means that, only by operating the operation unit, it is possible to lock the plurality of casters at the same time, operation is simplified.

  According to a seventh aspect of the present invention, there is provided a braking mechanism for a caster, wherein the braking operation transmitting means is provided with a reverse device between the front and rear shafts to output a reverse force when receiving a force in one direction from the outside. The reverse motion device and the shaft are connected to each other so that output can be transmitted, and the rotation of one of the shafts is configured by a braking operation transmission mechanism that transmits the rotation to the other shaft via the reverse motion device. To do.

  In the caster braking mechanism according to an eighth aspect of the present invention, the reverse movement device is rotatably supported by two rotation shafts on a support frame provided on the mounted body, and meshes with these rotation shafts. The rotating shaft protrudes from the support frame and the braking operation transmission mechanism has one end of the swing lever on each of the front and rear shafts and the protruding end of the rotating shaft facing these shafts. And connecting rods pivotably connected to the other ends of the swing levers.

  According to a ninth aspect of the present invention, there is provided a braking mechanism for a caster in which one rotation shaft of the reverse device is configured to be the same as one of the front and rear shafts, and the other shaft and the rotation shaft that faces this shaft. The protruding end is connected by a swing lever and a connecting rod rotatably connected to the swing lever.

  In the caster braking mechanism according to claim 10 of the present invention, the braking operation transmitting means is provided by providing the handle portion on each of the front and rear shafts with different vertical directions and crossing the surface forming the linkage between the front and rear shafts. The crank mechanism is pivotally supported and connected to the respective handle portions on the front and rear sides.

  A caster braking mechanism according to an eleventh aspect of the present invention is characterized in that a handle portion is formed at an end portion on the shaft side of the operation portion.

  The braking mechanism for a caster according to claim 12 of the present invention is formed by bending the operation portion into a U shape, and extending the handle portion with each shaft side end of the operation portion upside down. The operation parts are attached to the front and rear axes so that the directions of the handle parts facing each other are different from each other, and the handle parts having different directions in the front and rear are connected by linkage.

  According to a thirteenth aspect of the present invention, there is provided a caster braking mechanism in which the engaging member is detachably disposed on the engaging portion of the turning shaft in accordance with the displacement of the engaging member. The turning of the shaft is also locked at the same time.

  According to a fourteenth aspect of the present invention, there is provided a caster braking mechanism configured such that the shaft is elastically urged in one direction around the axis, and when the operating portion is pressed and operated by overcoming the elastic urging force by an external force. Is rotated at a predetermined rotation angle, and when the operation portion is pressed again by an external force, the shaft is unlocked and returned to its original position.

  A braking mechanism for a caster according to a fifteenth aspect of the present invention includes a support member that is attached to the mounted body side and through which the shaft passes, and a swinging member that faces the support member and has one end connected to the shaft and rotates integrally with the shaft. And an advancing / retracting means for inserting a locking member into the swinging end side of the swinging member so as to be movable back and forth in parallel with the shaft and projecting toward the support member side, and swingable on the support member. When an external force is applied to the part, the locking member is driven to swing, and the locking member is locked at a predetermined swinging angle to prevent return, and when an external force is applied to the operation part again, the locking member And an engaging / disengaging means for disengaging the engaging member and displacing the engaging member toward the swinging member to return it to the original position.

  A caster braking mechanism according to a sixteenth aspect of the present invention includes a caster in which a pair of wheels is disposed on the front and rear sides in the traveling direction of the mounted body via mounting members, and wheels are rotatably supported on the main body. A brake device that is provided on at least one of the pair of casters on the side and moves the engaging member forward and backward to detachably engage with the locking portion of the wheel to lock the wheel, and an operating shaft on the mounting member A shaft having a main operation portion on a mounted body is arranged such that one end protrudes from the mounting member and is pivotally supported so that one end is connected to the operating shaft and can be brought into contact with the engaging member. The shaft is rotatably supported, and is provided with a brake operation transmission mechanism for connecting the shaft and the operating shaft so as to be able to transmit motion and transmitting the rotation of the shaft to the operating shaft, and at least one of both ends of the shaft, Extending to the outside of the body to be mounted, and providing a sub-operation part at the extended end It is an feature.

  In the caster braking mechanism according to the sixteenth aspect of the present invention, a caster in which a pair of members is disposed on the front and rear sides in the advancing direction of the mounted body via mounting members, and a wheel is rotatably supported on the main body, A brake device that is provided on at least one of the pair of casters on the side and moves the engaging member forward and backward to detachably engage with the locking portion of the wheel to lock the wheel, and an operating shaft on the mounting member A shaft having a main operation portion on a mounted body is arranged such that one end protrudes from the mounting member and is pivotally supported so that one end is connected to the operating shaft and can be brought into contact with the engaging member. The shaft is rotatably supported, and is provided with a brake operation transmission mechanism for connecting the shaft and the operating shaft so as to be able to transmit motion and transmitting the rotation of the shaft to the operating shaft, and at least one of both ends of the shaft, Extend to the outside of the body to be mounted, and have a sub-operation part at the extended end. Because the main operation unit and the sub operation unit are provided around the mounted body, even if the direction of the mounted body constantly changes, the operator can easily approach the operating unit and work efficiency is improved. .

  In the caster braking mechanism according to claim 17 of the present invention, a braking device is provided for each caster, and the braking operation transmission mechanism is configured such that both ends of the operating shaft protrude from the mounting member, and the protruding other end of the operating shaft of the front and rear mounting members. They are connected to each other so as to be able to transmit motion, and the rotation of the shaft is transmitted to the operating shaft.

  In the caster braking mechanism according to claim 18 of the present invention, the shaft and the operating shaft protruding one end and the front and rear operating shaft protruding other ends are respectively connected to a swing lever and a swinging rod rotatably connected to the swing lever. It is characterized by having been connected by.

  According to a nineteenth aspect of the present invention, there is provided a caster braking mechanism comprising a left and right underframe and a horizontal frame connecting these underframes, and casters provided at both front and rear ends of the left and right underframe. It is characterized in that it is configured by supporting a shaft.

  A caster braking mechanism according to a twentieth aspect of the present invention is configured by elastically biasing a shaft in one direction around an axis, and any one of the main operation unit and the sub operation unit is operated by an external force. When a pressing operation is performed by overcoming the bullet urging force, the shaft is rotated and locked at a predetermined rotation angle, and either one of the main operation unit and the sub operation unit is pressed again by an external force. Then, the shaft is unlocked and returned to the original position.

  A caster braking mechanism according to a twenty-first aspect of the present invention includes a support member that is attached to the horizontal frame and through which the shaft passes, and a swinging member that faces the support member and has one end connected to the shaft and rotating integrally with the shaft. The locking member is provided on the swinging end side of the swinging member so as to be able to move back and forth in parallel with the shaft and protrudes toward the support member. When an external force is applied to any one of the operation portion and the sub operation portion, the engagement member is driven to swing, and the locking member is locked at a predetermined swing angle to prevent return. When an external force is applied again to any one of the main operation unit and the sub operation unit, the engagement with the locking member is released and the locking member is displaced to the swinging member side to return to the original position. An operation switching mechanism provided with an engaging / disengaging means for returning is provided.

  The operation switching mechanism of the operating device according to claim 1 of the present invention is operated by projecting a part of a switching member for switching operation from the operating device for performing mechanical operation to the outside, and moving the switching member forward and backward. An operation switching mechanism of an operating device for switching the operation of the device, wherein a shaft having an operating portion on a fixed side is pivotally supported to be elastically urged and an operation member having one end attached to the shaft is switched to a switching member When the operation part is pressed and operated by overcoming the bullet urging force by an external force, the shaft is rotated and locked at a predetermined rotation angle, and the operation part is again external force. Since the shaft is unlocked and returned to its original position when it is pressed, the wheel can be locked and unlocked simply by repeatedly pressing the operation section, improving operability. To do.

  The operation switching mechanism of the operating device according to claim 2 of the present invention operates by causing a part of the switching member for switching the operation to project from the operating device for performing the mechanical operation to the outside and moving the switching member forward and backward. An operation switching mechanism of an operating device for switching the operation of the device, wherein a shaft having an operating portion on a fixed side is pivotally supported to be elastically urged and an operation member having one end attached to the shaft is switched to a switching member A support member that is attached to the fixed side and through which the shaft passes, a swinging member that faces the support member and has one end connected to the shaft and rotating integrally with the shaft, and A locking member is mounted on the swinging end side of the swinging member in parallel with the shaft and is capable of moving forward and backward, and is provided in a swingable manner on the support member, and is provided on the operation member with an external force. Is added, it follows the locking member and swings to engage at a predetermined swing angle. When the member is locked to prevent the return of the locking member and an external force is applied again to the operation portion, the engagement with the locking member is released and the locking member is displaced to the swinging member side to return to the original position. Since the engagement / disengagement means for returning the vehicle to the vehicle is provided, the wheel can be locked and unlocked only by repeating the operation of pushing the operation unit, so that operability is improved.

  In the caster braking mechanism according to the sixth aspect of the present invention, the turning shafts are pivotally attached to the front and rear sides of the mounted body in the traveling direction, and the wheels are pivotally supported on the main body. A caster, a braking device provided on at least one of the pair of casters on the front and rear sides, and a locking device that displaces the engaging member and detachably engages with a locking portion of the wheel to lock the wheel; A shaft having an operation portion on the body is pivotally supported, and the front and rear sides of the shaft and the engagement member are arranged in the front-rear direction, and the operation member having one end attached to the shaft is used as the engagement member. And a braking operation mechanism that displaces the engaging member by operating the operation portion. When a unidirectional force is applied between the braking devices of the front caster and the rear caster, the force is reversed. Output in the direction and transmit the rotation of one of the shafts reversed to the other shaft Is provided with the braking operation transmission means, only by operating the operation unit, or to lock the wheels of the plurality of casters at the same time, it is possible or to unlock, and operability is improved, thereby improving the working efficiency.

  A caster braking mechanism according to a sixteenth aspect of the present invention includes a caster in which a pair of wheels is disposed on the front and rear sides in the traveling direction of the mounted body via mounting members, and wheels are rotatably supported on the main body. A brake device that is provided on at least one of the pair of casters on the side and moves the engaging member forward and backward to detachably engage with the locking portion of the wheel to lock the wheel, and an operating shaft on the mounting member A shaft having a main operation portion on a mounted body is arranged such that one end protrudes from the mounting member and is pivotally supported so that one end is connected to the operating shaft and can be brought into contact with the engaging member. The shaft is rotatably supported, and is provided with a brake operation transmission mechanism for connecting the shaft and the operating shaft so as to be able to transmit motion and transmitting the rotation of the shaft to the operating shaft, and at least one of both ends of the shaft, Because it is extended to the outside of the mounted body, and the sub-operation part is provided at the extended end Any position even in the operation unit only by operating a single operating unit, it is possible to lock and unlock the wheel, the operability is improved.

FIG. 1 is an overall perspective view showing an example in which an operation switching mechanism of an operating device according to an embodiment of the present invention is applied to a braking switching mechanism of a caster braking device. (Example 1) FIG. 2 is a perspective view showing a main part of the brake switching mechanism of FIG. 3 (A) to 3 (C) are explanatory views showing the caster braking device of FIG. FIG. 4 is a plan view of the brake switching mechanism of FIG. 1 as viewed from above. FIG. 5 is a plan view showing an advance / retreat mechanism and an engagement / disengagement mechanism of the brake switching mechanism of FIG. FIGS. 6A to 6C are a right side view, a front view, and a left side view, respectively, showing the action plate. FIG. 7 is a sectional view taken along line VII-VII of the action plate shown in FIG. FIG. 8 is a sectional view taken along line VIII-VIII of the action plate shown in FIG. FIGS. 9A and 9B are enlarged perspective views of main parts of the action plate shown in FIG. FIG. 10A is a plan view showing the brake switching mechanism of FIG. 5, and FIGS. 10B to 10E are explanatory views showing the operations of the swing member, the pin, and the action plate, respectively. FIG. 11 is an overall perspective view showing a braking mechanism for casters according to the first embodiment of the present invention. (Example 2) FIGS. 12A to 12C are explanatory views showing modifications of the caster braking mechanism of FIG. Example 3 FIG. 13: is the perspective view seen from the upper side which shows the braking mechanism of the caster which concerns on the 2nd Example of this invention. (Example 4) FIG. 14 is a perspective view of the caster braking mechanism of FIG. 13 as viewed from below. FIG. 15 is a perspective view showing a braking mechanism for casters according to the third embodiment of the present invention. (Example 5) FIG. 16 is a perspective view of the caster braking mechanism of FIG. 15 viewed from below. FIG. 17 is an overall perspective view showing a caster braking mechanism according to a fourth embodiment of the present invention. (Example 6) FIG. 18 is a perspective view of the caster braking mechanism of FIG. 17 viewed from below. FIG. 19 is a front view of the brake mechanism of the caster of FIG. FIG. 20 is a side view of the brake mechanism of the caster of FIG.

  For the purpose of improving the operability of the braking operation and the brake releasing operation, a part of the switching member for switching on / off of the brake is projected to the outside from the braking device of the caster, and the switching member is moved forward and backward to thereby increase the braking device. This is an operation switching mechanism of an operating device that switches on / off of the operation of the actuator, and is an operating member that is pivotally supported by a shaft having an operating portion on a fixed side to be elastically urged and one end is attached to the shaft Are arranged so as to be able to come into contact with the switching member, and when the operation part is pressed by an external force to overcome the elastic biasing force, the shaft is rotated and locked at a predetermined rotation angle. This is realized by releasing the lock of the shaft and returning it to the original position when it is pressed again by an external force.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. As shown in FIGS. 1 and 2, the operation switching mechanism 2 of the operating device according to one embodiment of the present invention includes an operation device that performs mechanical operation as a braking device 20 of a caster 5, and an operation switching mechanism as described above. Each is applied to the braking switching mechanism 60 of the braking device. In this embodiment, the operation device is a braking device for the casters 5 and the operation switching mechanism is replaced with the brake switching mechanism 60. The actuating device is not limited to a braking device, and may be an actuating device that performs mechanical operation. A part of a switching member that switches operation from the actuating device protrudes outside, and the switching member is Needless to say, any operation switching mechanism may be used as long as the actuator is moved forward and backward to switch the operation of the operation device on and off.

  First, the caster 5 and its braking device 20 will be described with respect to the braking switching mechanism 60 of the braking device according to one embodiment of the present invention. The caster 5 is provided on the bottom 4 of the furniture (attached body) 3 such as a carriage or a floor-top base (see FIGS. 3 and 4). The casters 5 (5A to 5D) are attached to the four corners of the bottom 4 of the furniture 3 by retreating them inward via attachment members 6 (6FR, 6FL, 6RR, 6RL, see FIG. 1). The caster 5 is rotatably attached to the attachment member 6. Two attachment members 6 are attached in pairs to the front and rear sides of the bottom portion 4 in the traveling direction. The attachment members 6FR, 6FL and 6RR, 6RL arranged in pairs on the front and rear sides are arranged so as to face each other on the front and rear sides (the front left attachment member 6FL and the rear left attachment member 6RL, Front right attachment member 6FR and rear right attachment member 6RR).

  The caster 5 is a twin-wheel type caster, and as shown in FIGS. 3A and 3B, a pair of wheels 11 are rotatably supported on the left and right sides of the caster body 10 via an axle 12. Composed. The caster body 10 is formed with a through hole 14 penetrating vertically at a position eccentric to the front side in the traveling direction from the axle 12, and the turning shaft 13 is rotatably fitted in the through hole 14. A screw part 13A is formed on the upper part of the turning shaft 13, and a flange part 15 for rotating the turning shaft 13 is provided below the screw part 13A. The lower end of the pivot shaft 13 protrudes from the lower opening of the through hole 14 of the caster body 10, and a pin 18 is press-fitted into the small-diameter portion 13 </ b> B of the pivot shaft 13 to prevent the caster body 10 from coming off. The left and right wheels 11, 11 are formed such that inner surfaces are recessed in an annular shape, and an uneven portion (locking portion) 17 is formed along the outer peripheral surface of the annular recessed portion.

  The turning shaft 13 is attached to the attachment member 6. As shown in FIGS. 2 and 3 (A) to (C), the attachment member 6 has a U-shaped main body having a bottom portion 6A and left and right walls 6B, 6C rising from the left and right of the bottom portion 6A, The walls 6B and 6C are configured to include bent portions 6E that are formed by bending the upper ends of the walls 6B outward and are provided with attachment holes 6D to the bottom 4 of the furniture 3. As for the attachment member 6, the bending part 6E is attached to the bottom part 4 of the furniture 3 with a screw. A circular hole 6H that is loosely inserted into the threaded portion 13A of the pivot shaft 13 is formed in the bottom portion 6A of the mounting member 6, and through holes 6G and 6G that are opposed to each other and penetrate the left and right walls 6B and 6C from the circular hole 6H. Each is formed on the rear side in the traveling direction. The caster 5 is attached to the attachment member 6 by screwing the screw portion 13A of the turning shaft 13 into the circular hole 6H. For this reason, when the attachment member 6 is attached to the bottom portion 4 of the furniture 3, the caster 5 rotates with respect to the attachment member 6. Thus, the casters 5 are attached to the four corners of the bottom 4 of the furniture 3 via the attachment members 6FR, 6FL, 6RR, 6RL.

  The caster 5 is provided with a braking device (actuating device) 20 that locks the rotation of the wheel 11. In the braking device 20, a vertical hole having a circular cross section that is vertically penetrated on the same axis is formed in the pivot shaft 13, and a braking rod (switching member) 22 is inserted into the vertical hole so as to be movable up and down. It has become. The outer surface of the brake rod 22 is formed to substantially match the shape of the vertical hole, and has a structure that can move up and down. The upper part of the brake rod 22 is exposed to protrude from the upper end opening of the vertical hole, and a disc-shaped first holding member 23 is attached in the vicinity of the upper end surface 21, and the first holding member 23 and the pivot shaft A spring (braking rod biasing spring) 24 is interposed between the upper end surface of 13 and the braking rod 22 is constantly biased upward.

  The lower part of the brake rod 22 protrudes from the opening at the lower end of the vertical hole of the turning shaft 13, and a wheel lock member 30 is provided at the protruding end. The wheel lock member 30 is prevented from coming off at the lower end of the brake rod 22 and is inserted in a vertically movable manner and has a concave portion 25A formed on the upper surface thereof. The wheel lock member 30 extends downward continuously from the cylindrical main body 25. An engaging / disengaging portion 26 having a concave portion 26A formed on the upper surface and an uneven portion 27 formed on the lower surface is provided. The recessed portion 26A is slidably fitted into a cylindrical protruding portion 10A formed below the shaft hole of the caster body 10.

  A second holding member 28 is attached to the lower portion of the brake rod 22 above the wheel lock member 30, and a spring (wheel lock) is provided between the second holding member 28 and the upper surface recessed portion 25 </ b> A of the cylindrical body 25. When the brake rod 22 is pushed down against the elastic urging force of the spring 24, the wheel lock member 30 is urged toward the uneven portion 17 side of the wheels 11 and 11. It is like that. As described above, the braking device 20 includes the braking rod 22 and the wheel lock member 30, and when the braking rod 22 is pushed down against the elastic urging force of the spring 24 by an external force, the spring 29. The wheel lock member 30 is pushed downward to engage the concavo-convex portion 27 with the concavo-convex portion 17 of the wheels 11, 11 to lock the wheels 11, 11. And when the external force with respect to the brake rod 22 is lost, the brake rod 22 is elastically restored upward by the spring 24, and the uneven portion 27 of the wheel lock member 30 is detached from the uneven portion 17 of the wheels 11, 11, and the wheels 11, 11 is unlocked, and the wheels 11 and 11 are allowed to rotate.

  Of the four corners of the bottom 4 of the furniture 3, the left and right mounting members 6FL and 6FR mounted on the front side in the traveling direction are connected between the both mounting members 6FL and 6FR, and through holes are formed through the sliding member 43. A front side shaft 40 (in this embodiment, a hexagonal square shaft) having a polygonal cross section that is rotatably supported by 6G is provided, and the left and right attachment members 6RL and 6RR on the rear side in the traveling direction are provided with a front side shaft. Similarly to the side, both the mounting members 6RL and 6RR are connected to each other, and a rear side shaft 41 having a polygonal cross section is provided through the sliding member 43 so as to be rotatably supported by the through hole 6G. Both shafts 40 and 41 are arranged in parallel. The through holes 6G of the mounting members 6FL, 6FR, 6RL, 6RR are formed on the rear side in the traveling direction from the circular holes 6H. That is, the brake rod 22 protruding upward from the pivot shaft 13 of the caster body 10 is arranged on the front side in the traveling direction with respect to the shafts 40 and 41. The shafts 40 and 41 may have a round bar shape with a circular cross section as long as a predetermined strength can be secured.

  The operation tool (operation unit) 50 has an operation end 51 having a U-shaped cross-section with one end connected to the front shaft 40 and the left and right sides bent upward so that it can be easily operated with a hand or a foot. ing. The operation end 51 protrudes outward from the bottom portion 4 and is exposed.

  A transmission link (braking operation transmission means) 54 is provided between the shafts 40 and 41 to connect the shafts 40 and 41 so as to transmit motion. The transmission link 54 has swing arms 55 and 56, one end of which is connected to the shafts 40 and 41 so as to be integrally movable, and a connecting rod 57 whose both ends are rotatably connected to the swing arms 55 and 56 by pins. And is configured. The transmission link 54 transmits the rotational force of the front side shaft 40 given by the operation of the operation tool 50 to the rear side shaft 41 in the same direction (see FIG. 4).

  Each shaft 40, 41 is provided with an actuating member (braking operation transmitting means) 42 (42A to 42D) for moving the brake rod 22 downward in accordance with the rotation of the shafts 40, 41, respectively. As shown in FIGS. 3A to 3C, the actuating member 42 is configured such that the one end cylindrical portion 44 is inserted into the shafts 40 and 41 and is disposed inside the mounting member 6. The actuating member 42 is configured such that the swing end 45 of the other end abuts on the upper end surface 21 of the brake rod 22 and swings integrally with the shafts 40 and 41 to push down the brake rod 22. For this reason, when the operation end 51 of the operation tool 50 is pushed down by an external force, the swinging end portion 45 of the operating member 42 with which the front shaft 40 moves integrally is brought into contact with the upper end surface 21 and pushed down (FIG. 3A ) And (B) (see the counterclockwise direction of the shaft 40), and this rotational force is transmitted to the rear side shaft 41 via the transmission link 54. The rear side shaft 41 to which the rotational force is transmitted also rotates in a direction in which the swinging end portion 45 of the actuating member 42 that moves integrally is brought into contact with the upper end surface 21 and pushed down.

  Thus, when the operation end 51 of the operation tool 50 is pushed down, the shafts 40 and 41 are simultaneously rotated, and the swinging end portion 45 of the operating member 42 that moves integrally with the shafts 40 and 41 is moved to the brake rod 22. When the brake rod 22 is further pushed down against the elastic force of the spring 24 against the upper end surface 21 of the wheel, the brake rod 22 is pushed down, and the uneven portion 27 of the wheel lock member 30 is formed into the uneven portion of the wheels 11, 11. The wheels 11 and 11 of the casters 5 are locked by engaging with the portion 17. When the push-down force is lost from the operation end 51 of the operation tool 50, the brake rod 22 is displaced upward by the elastic force of the spring 24, pushes up the operating member 42, and rotates each shaft 40, 41 in the opposite direction (see FIG. 3 (A) and (B) (see the clockwise direction of the shaft 40), the operation end 51 is returned to the original position. Then, when the brake rod 22 returns to the upper end position, the rotation lock of the wheels 11 and 11 of the caster 5 is released. Thus, in the present embodiment, the brake rod 22 is disposed on the front side with respect to the shaft cores of the shafts 40 and 41, and the operation tool 50 is disposed on the front side from the shaft core. Therefore, a lever is formed with the shaft core as a fulcrum, the operation end 51 as a power point, and the brake rod 22 as an action point, and the brake rod 22 is disposed between the fulcrum (axis core) and the force point (operation end 51). Therefore, when the operation end 51 is locked (when the push-down operation is performed), a pressing force is received from the swing end 45 of the operating member 42 in the same direction as the operation direction.

  By the way, as described above, the operation switching mechanism 2 of the operating device according to the present embodiment has the front shaft (shaft, braking operation transmission means) having the operation tool (operation unit) 50 on the bottom (fixed side) 4 of the furniture 3. ) 40 is pivotally supported, and the swing end 45 of the actuating member 42 having one end attached to the front shaft 40 is disposed so as to be able to contact the upper end surface 21 of the brake rod (switching member) 22. In addition, the front shaft 40 is elastically biased in one direction around the axis, that is, in a direction against the external force (counterclockwise direction of the shaft 40 in FIG. When the force 50 is defeated by an external force and pressed, the front shaft 40 is rotated to lock the front shaft 40 at a predetermined rotation angle, and the operation tool 50 is pressed again by the external force. Then, the brake switching machine that unlocks the front side shaft 40 and returns the front side shaft 40 to the original position. 60 by the constructed.

  That is, the brake switching mechanism 60 is attached to the bottom portion 4 and has a support member 61 through which the front shaft 40 passes, and one end of the brake switching mechanism 60 that faces the support member 61 is connected to the front shaft 40 and rotates together with the front shaft 40. The swinging member 62 to be moved, and a cylindrical pin (locking member) 63 is inserted on the swinging end side of the swinging member 62 so as to be movable back and forth in parallel with the front side shaft 40 and protrudes toward the support member 61 side. An advancing / retracting mechanism (advancing / retracting means) 70 and a support member 61 are provided so as to be swingable. When an external force is applied to the operation end 51, the pin 63 is driven to swing and the pin 63 is rotated at a predetermined swing angle. When the external force is applied to the operation end 51 again, the engagement with the pin 63 is released and the pin 63 is displaced toward the swinging member 62 to return to the original position. And a mechanism (engagement / disengagement means) 80.

  As shown in FIGS. 5 and 10A, the support member 61 is formed of a bent plate having an L-shaped cross section, and is attached to the bottom portion 4 of the furniture 3 via screws, and the mounting portion 61A. And a wall portion 61B extending vertically downward from the left and right side edges. The swing member 62 is connected to the shaft 40 by inserting the one end cylindrical portion 62 </ b> A through the front shaft 40. A spring 46 is interposed between the swing member 62 and the support member 61, and the front shaft 40 is arranged in one direction around the axis, that is, in the clockwise direction of the shaft 40 shown in FIG. The bullet is energized. A protrusion 62C is formed on the upper surface of the swing end 62B of the swing member 62. When the front side shaft 40 is urged, the protrusion 62C comes into contact with the lower surface of the mounting portion 61A of the support member 61, and the front shaft 40 is prevented from turning further around the axis.

  A through hole 64 is formed in parallel with the front shaft 40 on the swinging end 62 </ b> B extending forward in the traveling direction of the swinging member 62. A pin 63 longer than the length of the through hole 64 is attached to the through hole 64 so as to prevent the pin 63 from moving forward and backward. The wall 61B side protrusion 63A of the pin 63 is provided with a spring receiver 65, and a spring (first spring, pin urging spring) 66 is interposed between the spring receiver 65 and the swing member 62. The pin 63 is always urged toward the wall 61B, and the wall-side end face 63C protrudes toward the wall 61B. In this manner, the advance / retreat mechanism 70 includes the pin 63 mounted on the swing end 62B side of the swing member 62 so as to be prevented from falling off and through the through-hole 64 formed in parallel with the front shaft 40, and forward and backward. A spring 66 is provided between the pin 63 and the swinging member 62 so that the pin 63 is elastically urged to protrude toward the wall 61B side of the support member 61.

  An action plate 71 is provided on the wall 61B of the support member 61 so as to be swingable by a pivot pin 72 so as to face the swinging end 62B of the swinging member 62. A spring (second spring, action plate biasing spring) 73 is interposed between the action plate 71 and the support member 61, and the upper surface side one side edge 71A of the action plate 71 is connected to the protrusion 63A of the pin 63. Among them, the spring receiver 65 is brought into contact with the end portion (projecting end portion) 63B on the wall portion 61B side, and the action plate 71 is brought into contact with the stopper 74 provided on the wall portion 61B so as to be further upward. Is prevented, and the upward swing position is restricted. The spring 46 interposed between the swing member 62 and the support member 61 has a larger elastic biasing force than the spring (action plate biasing spring) 73. When the force that overcomes the spring 73 by the pin 63 is applied to the upper surface side one side edge portion 71A and pressed, the action plate 71 swings and slides the pin 63 to the upper surface side one side edge portion 71A. It leads to the part 75. When the action plate 71 is pressed by the pin 63 and is pushed downward about the pivot pin 72 shown in FIG. 10B, the pin 63 is locked at a predetermined rotation angle, and the pin 63 is moved upward. When the pin 63 is pressed again by the pin 63 in the lock position and pushed down in the same clockwise direction, the pin 63 is unlocked and the pin 63 is returned to the original position. As described above, the engagement / disengagement mechanism 80 includes the pin 63 that is held by the swinging member 62 so as to be movable back and forth, and the action plate 71 that swings in accordance with the pin 63.

  As shown in FIGS. 7 and 8, the action plate 71 is formed in a substantially right triangle shape and is thick, and a concave portion 75 for receiving the pin 63 is formed at the terminal edge of the upper surface side one side edge portion 71A. (See FIGS. 6 and 9). The recessed portion 75 is formed by cutting the terminal end of the upper surface side one side edge portion 71A, and receives the end portion 63B on the wall portion 61B side from the spring receiver 65 among the protruding portions 63A of the pin 63, and the pin 63 at the receiving position. An indented portion 76 (see FIG. 10D) that locks the end portion 63B of the inner surface and a receiving end 77 that protrudes outwardly toward the end of the upper surface side one side edge portion 71A, and is formed on one side of the upper surface side. When the end portion 63B of the pin 63 that slides along the edge portion 71A is detached from the terminal end of the one side edge portion 71A on the upper surface side, the transfer portion 78 (FIG. ))). When the end portion 63B of the pin 63 is detached from the terminal end 71A of the upper surface side one side edge portion 71A and hits the receiving end 77, the transfer portion 78 once introduces this end portion 63B into the inner surface of the receiving end 77, and the pin 63 When returning to the return direction and starting to separate, the end 63B of the pin 63 is guided to the notch 76. The transfer portion 78 is formed between a concave recess portion 78A continuous from the inner surface of the receiving end 77 and a notch 76 from the end of the upper side edge portion 71A, and is received in the concave recess portion 78A. When the pin 63 tries to return to the return direction along the return trajectory T in the recessed portion 75, the pin 63 is configured to have a direction changing portion 78B that changes the direction and guides the pin 63 to the notched portion 76.

  Further, the surface of the action plate 71 facing the swing member 62 is formed continuously with the notch 76, and the pin 63 engaged with the notch 76 has an urging direction of the front shaft 40 by an external force. When the notched portion 76 is disengaged by displacing in the reverse direction, a disengagement guide path 81 for guiding the end 63B of the pin 63 to push the pin 63 toward the swing member 62 and to disengage the return pin 63 to the outside of the action plate 71. (See FIG. 10E) is formed. When the end portion 63B of the pin 63 is displaced from the notched portion 76 in the direction opposite to the urging direction of the front shaft 40 by the external force and separated, the separation guide path 81 moves the end surface 63C of the end portion 63B of the pin 63 to a lower position. An introduction guide portion 82-85 for placing the end portion 63B of the pin 63 along the wall surface 83 from the inclined surface 84 to the step portion 85 along the wall surface 83, and a trajectory T in the return direction of the pin 63 that continues to the step portion 85. (See (E) of FIG. 10) and a guide inclined portion 86-87 for guiding the pin 63 to the outside. The guide inclined portion 86-87 is connected to the step portion 85, and a guide inclined surface 86 that connects the step portion 85 and a portion 71Aa facing the pin 63 of the upper surface side one side edge portion 71A with a gentle inclined surface, and this And a wall surface 87 formed along the pivot pin 72 side of the guide inclined surface 86.

  Since the action plate 71 is configured as described above, as shown in FIG. 10B, the front shaft 40 is elastically biased by the spring 46, and nothing is applied to the operation end 51 of the operation tool 50. In a state where no external force is applied, the protrusion 62C on the upper surface of the swing member 62 abuts on the lower surface of the mounting portion 61A of the support member 61 so that the swing member 62 is held substantially horizontal, and the pin 63 is held on one side edge on the upper surface side. It is in a state of being placed on the portion 71A. At this time, the braking device 20 is in a non-braking state in which the braking rod 22 is biased upward, as shown in FIG.

  When an external force that overcomes the elastic urging force of the spring 46 is applied to the operation end 51 and the front shaft 40 rotates in the counterclockwise direction in FIG. 10B, the end 63B of the pin 63 has an upper surface side. The action plate 71 is slid in contact with the one side edge 71A, and the action plate 71 is pushed down around the pivot pin 72 in the clockwise direction. When the pin 63 is further pushed down and the end 63B of the pin 63 is disengaged from the terminal end of the one side edge 71A on the upper surface side, the action plate 71 once returns to the counterclockwise direction by the spring 73, and the end of the pin 63 63B is led from the inner side surface of the receiving end 77 into the rectangular recess 78A (see FIG. 10C). When the pin 63 is introduced into the rectangular recess 78A, the action plate 71 is further prevented from being displaced downward by the compressed spring 73, and even if an external force is applied to the operation end 51, the action plate 71 is displaced further. Is regulated. For this reason, when the worker stops applying external force to the operation end 51, the pin 63 tries to return to the return direction by the spring 46. At this time, since the upper side of the recessed portion 75 is open, the pin 63 is displaced in an arc upward along the trajectory T in the return direction. Then, the end 63B of the pin 63 is guided to the notched portion 76 by the direction changing portion 78B, the upward displacement is restricted, and the pin 63 is locked in that state (see FIG. 10D). . At this time, as shown in FIG. 3B, the braking device 20 is held in a state where the upper end surface 21 of the braking rod 22 is pressed against the swinging end 45 of the operating member 42, and the wheel lock member 30. The uneven portion 27 engages with the uneven portion 17 of the wheel 11 so that the wheel 11 is locked. When the pin 63 is introduced into the square recess 78A, the operation tool 50 reaches the push-down restricting position where the pin 63 cannot be pushed down any further, and the pin 63 returns from the square recess 78A to the notch 76 in the return direction. Due to the displacement, the operation tool 50 returns upward from the depressing restriction position.

  When the external force that overcomes the elastic biasing force of the spring 46 is applied to the operation end 51 from the locked state in which the pin 63 is locked to the notch 76, and the force that reaches the depressing restriction position is applied again, the front shaft 40 is moved. When rotating counterclockwise in FIG. 10D, the end portion 63B of the pin 63 has the end surface 63C placed on the lower floor surface 82 and is guided from the inclined surface 84 to the stepped portion 85. At this time, since the end portion 63B of the pin 63 is in contact with the wall surface 83, further downward displacement is restricted, and even when an external force is applied to the operation end 51, further displacement is restricted. For this reason, when the worker stops applying external force to the operation end 51, the pin 63 tries to return to the return direction by the spring 46. Then, the pin 63 is pushed out of the action plate 71 by sliding the end surface 63C along the return trajectory T from the step portion 85 along the guide inclined surface 86 and the end portion 63B sliding along the wall surface 87, and returns to the original position. (Refer to FIG. 10B). For this reason, the operator only repeats the pressing operation of the operation end 51 to lock the pin 63 at the lower locking position and operate the braking device (actuating device) 20 to lock the wheel 11 or lock the pin 63. The wheel 11 can be unlocked by releasing the brake device 20 and releasing the lock.

  Next, the operation of the operation switching mechanism 2 of the operating device according to the above embodiment will be applied to the operation of the braking switching mechanism 60 of the braking device 20 of the caster 5 and will be described based on the operation of the braking switching mechanism 60 of the braking device 20. To do. The brake switching mechanism 60 of the brake device 20 causes the brake rod 22 of the brake device 20 that performs the brake and brake release operations of the caster 5 to protrude upward from the pivot shaft 13, and the brake rod 22 is moved forward and backward to perform braking. The braking of the device 20 is switched on and off. When the operator presses the operation end 51 of the operation tool 50 provided on the front side of the furniture 3 with a foot or a hand, the front side shaft 40 rotates against the elastic biasing force of the spring 46, and the swing member Pin 63 that moves integrally with 62 presses upper surface side one side edge portion 71A of action plate 71 to swing action plate 71 downward, and pin 63 disengages from the end of upper surface side one side edge portion 71A and delivers it. When reaching the portion 78, the pin 63 returns to the return direction in the recessed portion 75, hits the direction changing portion 78A, is guided to the notch 76, and is locked to the notch 76, and the displacement in the return direction is restricted. The At this time, the rotation of the front shaft 40 is also transmitted to the rear shaft 41 through the connecting rod 57, and the swing end 45 of the actuating member 42 that moves integrally with each shaft 40, 41 is the upper end surface 21 of the brake rod 22. Is held down, and the brake devices 20 of the casters 5A to 5D are held in the operated state simultaneously. For this reason, the wheels 11 and 11 of all the casters 5A to 5D are locked. As described above, when the brake device 20 is operated and the wheels 11 and 11 are locked, the operation tool 50 returns upward as much as the pin 63 returns in the return direction from the press-down restricting position where the operation tool 50 cannot be further pressed down. That position is maintained.

  When an external force that overcomes the elastic biasing force of the spring 46 is again applied to the operation end 51 of the operation tool 50 and is pushed down to the push-down restricting position, the front shaft 40 is rotated, and this turning force is moved to the rear side through the connecting rod 57. It is also transmitted to the shaft 41. The pin 63 moves integrally with the swinging member 62 as the shafts 40 and 41 rotate, and when the pin 63 is pushed down from the locked state engaged with the notched portion 76 of the action plate 71, the end 63B is guided to be detached. It is led to the path 81. When the end portion 63B of the pin 63 is guided to the separation guide path 81, the end surface 63C of the pin 63 passes through the introduction guide portion 82-85 in the order of the lower floor surface 82, the inclined surface 84, and the step portion 85 of the action plate 71. When the end 63B of the pin 63 hits the wall surface 83, the operation end 51 of the operation tool 50 reaches the depressing restriction position, and further depressing is prevented. At this time, the end surface 63C of the end portion 63B of the pin 63 is pressed against the step portion 85 on the trajectory T in the return direction, and the pin 63 receives the elastic biasing force of the spring 46 together with the front side shaft 40 to guide the pin 63. While passing through the guide inclined surface 86 and the wall surface 87 along the inclined portion 86-87, it is pushed out to the swing member 62 side, is detached from the action plate 71, returns to the original position, and the shafts 40, 41 are also operated by the operating tool 50. The operating end 51 also returns to the original upper position. In this way, the swinging end portion 45 of the operating member 42 also returns to the original position, the braking device 20 is released from braking, and the wheels 11 and 11 are unlocked. As described above, in the brake switching mechanism 60 of the braking device 20 according to the present embodiment, the operator can repeatedly lock and unlock the wheels 11 and 11 simply by repeatedly pressing the operation end 51 of the operation tool 50. And operability is improved.

  Next, a description will be given of the caster braking mechanism 102 according to the first embodiment of the present invention. In the caster braking mechanism 102 according to the first embodiment of the present invention, the braking switching mechanism 60 of the braking apparatus according to the above-described embodiment is configured such that the turning shaft 13 is located on the front side in the traveling direction with respect to the mounting member 6 and the braking rod 22 is disposed. While the shafts 40 and 41 of the actuating member 42 to be operated are provided on the rear side in the traveling direction, the positions of the pivot shaft 13 and the shafts 140 and 141 of the actuating member 42 are different on the front side and the rear side in the traveling direction. When a force in one direction is received between the front and rear shafts 140 and 141, this force is output in the opposite direction, and the rotation of one of the shafts 140 or 141 is reversed to the other shaft 141 or 140. The difference is that a braking operation transmission mechanism (braking operation transmission means) 157 for transmitting is provided, and an operating portion 150 is provided on each of the front and rear shafts 140 and 141 so that the operation can be performed from either the front or rear side. Almost identical It has formed. The same reference numerals indicate the same or corresponding parts.

  As shown in FIG. 11, the caster braking mechanism 102 according to the present embodiment has casters 105 (105 </ b> A to 105 </ b> D) at four corners of the bottom portion 4 of the furniture 3 via attachment members 106 (106 FR, 106 FL, 106 RR, 106 RL). ) Is retracted inward and attached. Two attachment members 106 are attached to the front side of the bottom portion 4 (see attachment members 106FR and 106FL), and two attachment members 106 (see attachment members 106RR and 106RL) are attached to the rear side. The attachment members 106FR and 106FL and 106RR and 106RL arranged in different pairs in the front and rear are arranged to face each other in the front and rear.

  The front mounting members 106FR and 106FL are provided with the pivot shafts 13 and 13 of the casters 105A and 105B on the front side in the traveling direction F, respectively, and the front shaft 140 is rotatable on the rear side of the one front mounting member 106FL. An operating member 42 that is pivotally supported and connected to the front side shaft 140 presses the braking rod 22 that protrudes forward and backward from the turning shaft 13. Further, on the rear mounting members 106RR and 106RL, the pivot shafts 13 and 13 of the casters 105C and 105D are respectively mounted on the side of the backward direction R with respect to the traveling direction F, and the rear side of the one rear mounting member 106RR is rearward. The side shaft 141 is pivotally supported so that the actuating member 42 connected to the rear side shaft 141 presses the brake rod 22 protruding forward and backward from the turning shaft 13.

  The front side shaft 140 and the rear side shaft 141 protrude from the attachment members 106FL and 106RR and extend toward the center. One end of each of the operation portions 150 and 151 formed by bending the pipe into a U-shaped cross section is connected to the protruding side of each of the shafts 140 and 141. The positions where the one branch end 152 of the operation units 150 and 151 and the shafts 140 and 141 are connected to each other and the portion of the other branch end 153 are the positions of the two swing end positions of the operation units 150 and 151 in the vertical direction. An operation tool locking mechanism 160 that restricts and holds the operation units 150 and 151 at each swing end position is provided. The operation tool locking mechanism 160 is attached to the bottom portion 4 and includes a support 161 that accommodates the connection side ends 152 and 152 of the operation unit 150 through which the shafts 140 and 141 pass.

  By the way, the caster braking mechanism 102 according to the present embodiment includes one of the shafts 140 and 141 between the projecting end portions 140A and 141A in which the shafts 140 and 141 project through the supports 161 and 161. A braking operation transmission mechanism (braking operation transmission means) 157 that receives the turning force from the shaft 140 or 141 by the operation unit 150 or 151 and outputs the turning force in the reverse direction and transmits the turning force to the other shaft 141 or 140 is transmitted. Provided and configured. The braking operation transmission mechanism 157 is configured by providing a reverse device 171 between the projecting end portions 140A and 141A of the shafts 140 and 141, and connecting the reverse device 171 and the shafts 140 and 141 so that output can be transmitted. Is done.

  The reverse movement device 171 pivotally supports two rotation shafts 173A and 173B on a support frame 172, and engages the rotation shafts 173A and 173B with gears 174A and 174B that engage with each other. The shafts 173A and 173B are protruded from the support frame 172, and the support frame 172 is attached to the bottom 4 of the furniture 3. One end of swing levers 176 and 177 is connected to the projecting end portion 140A of the front side shaft 140 and the projecting end portion 175 of one rotating shaft 173A facing the projecting end portion 140A. A connecting rod 178 is pivotally supported and connected to the other end of 177. Further, one end of the swing levers 180 and 181 is connected to the projecting end portion 141A of the rear shaft 141 and the projecting end portion 179 of one rotating shaft 173B facing the projecting end portion 141A, respectively. A connecting rod 182 is pivotally connected to the other ends of the levers 180 and 181 and connected thereto.

  Since the caster braking mechanism 102 according to the present embodiment is configured as described above, when one of the front and rear operation units 150 (151) is pressed, one shaft 140 (141) is rotated, The operating member 42 presses the brake rod 22 protruding from the turning shaft 13 to lock the wheels 11 and 11, and the operation unit 150 (151) is held at the lower swing end position by the operation tool lock mechanism 160. Therefore, the wheels 11 and 11 of the caster 105A remain in the locked state. On the other hand, when the operating portion 150 (151) is pressed, if the swing lever 176 (180) swings as the one shaft 140 (141) rotates, the rotational force of the shaft 140 (141) is connected. It is transmitted to the rotation shaft 173A (173B) of the reverse device 171 through the rod 178 (182), and the rotation shaft 173A (173B) rotates in the same direction as the shaft 140 (141). Then, the rotation of the rotation shaft 173A (173B) is output in the reverse direction to the other rotation shaft 173B (173A) through the gears 174A and 174B, and the other shaft 141 (140) through the other connecting rod 182 (178). To be communicated to. As described above, the caster braking mechanism 102 according to the present embodiment can lock the plurality of casters 105A and 105D at the same time only by operating one of the operation sections 150, and the operation is simplified.

  In the caster braking mechanism 102 according to the above embodiment, the reverse device 171 and the shafts 140 and 141 are connected by the two connecting rods 178 and 182. However, the present invention is not limited to this. One of the two rotating shafts 173A and 173B of the reverse device 171 is configured to be connected to one of the shafts 140 and 141 in the same axis, and a single connecting rod is configured. You may make it do (refer (A) of FIG. 12, (B)). In the caster braking mechanism 102 according to the above-described embodiment, only the front and rear casters 105A and 105D are braked. However, the present invention is not limited to this, and the front and rear axes are extended. The front shaft 140X is rotatably supported by the front mounting members 106FR and 106FL, and the rear shaft 141X is rotatably supported by the rear mounting members 106RR and 106RL. A braking operation is transmitted between the shafts 140X and 141X. A mechanism 157 may be provided to brake the front casters 105A and 105B and the rear casters 105C and 105D at the same time (see FIG. 12C). Further, in the present embodiment, the operation tool lock mechanism 160 restricts both the upper and lower swing end positions of the operation units 150 and 151, holds the operation units 150 and 151 at the respective swing end positions, and the wheels 11 and 11. However, the present invention is not limited to this, and instead of the operation tool locking mechanism 160, a part of the operation switching mechanism 2 of the operating device according to the first embodiment is configured. Needless to say, the braking switching mechanism 60 may be used. In this case, the operation can be performed from either the front or rear side, and the braking and release of the wheel can be performed only by repeating the pressing operation.

  Next, a description will be given of a caster braking mechanism 202 according to a second embodiment of the present invention. The caster braking mechanism 202 according to the present embodiment outputs the force in the opposite direction when the caster braking mechanism 102 according to the second embodiment receives a force in one direction between the front and rear shafts 140 and 141. A braking operation transmission mechanism 157 is provided for transmitting the rotation of one of the shafts 140 or 141 by inverting it to the other shaft 141 or 140. The braking operation transmission mechanism 157 is provided as a protruding end portion of each of the shafts 140 and 141. 140A and 141A are provided with a reverse movement device 171 and the reverse movement device 171 and the respective shafts 140 and 141 are connected so as to be able to transmit the output. When a force in one direction is received between the shafts 240 and 241, this force is output in the reverse direction, and the rotation of one of the shafts 240 or 241 is inverted and transmitted to the other shaft 241 or 240. 25 That the provided is different.

  That is, the caster braking mechanism 202 according to the second embodiment of the present invention has casters 5 (5A to 5D) at the four corners of the bottom 204 of the furniture via the attachment members 206 (206FR, 206FL, 206RR, 206RL). Is retracted inward and pivotally attached. Two attachment members 206 are attached in pairs to the front and rear sides of the bottom portion 204 in the traveling direction, and are arranged in pairs in the front and rear. As in the first embodiment, the front-side shaft 240 connecting the two mounting members 206FL and 206FR is provided on the traveling direction front side mounting members 206FL and 206FR. The rear side shaft 241 that connects the two mounting members 206RL and 206RR is rotatably provided, and both the shafts 240 and 241 are arranged in parallel. The front shaft 240 is disposed on the rear side in the traveling direction with respect to the braking rod 22 protruding upward from the pivot shaft 13 of the caster body 10, and the rear shaft 241 is disposed on the front side in the traveling direction with respect to the braking rod 22. Is done.

  Operating tools (operation units) 250F and 250R are attached to the front and rear shafts 240 and 241, respectively, between the front attachment members 206FL and 206FR and between the rear attachment members 206RL and 206RR. The operation tools 250F and 250R are each formed by bending an elongated metal plate into a U shape, and the extended open ends are attached to the shafts 240 and 241. The bent operation end 251 protrudes outward from the bottom portion 204 and is exposed.

  An upper handle portion (pattern portion) 253 and a lower handle portion (handle portion) 254 are formed on the open ends (shaft side end portions) 252A and 252B of the operation tools 250F and 250R, respectively, with different vertical directions. . The upper handle 253 projects upward from slots 204A and 204B formed in the bottom 204. Both the operation tools 250F and 250R are arranged so that the positions of the left and right directions are aligned with the respective axes 240 and 241 so that the handle parts 253 to 254 and 254 to 253 having different directions face each other on the front and rear operation tools 250F and 250R. .

  The upper end of the upper handle 253 of the front operation tool 250F and the lower handle 254 lower end of the rear operation tool 250R are both ends of the right link (joint) 255, and the lower end of the lower handle 254 of the front operation tool 250F. And the upper end of the upper handle portion 253 of the rear operation tool 250R are connected to both ends of a left link (ream) 256 via pins so as to connect the two operation tools 250F and 250R. ing. Each link 255, 256 is connected at an angle through the slots 204A, 204B. That is, the operation tools 250F and 250R are connected across the surface formed between the front and rear shafts 240 and 241. Thus, the upper handle portion 253, the lower handle portion 254, and the left and right links 255, 256 receive this force from the handle portions 253, 254 when the shaft 240 receives a turning force in one direction by one operating tool 250F. The crank mechanism is configured to transmit to 256 and output to the other shaft 241 as a rotational force in the reverse direction. That is, the braking operation transmission mechanism 257 is configured to transmit the rotation of one of the shafts by reversing the rotation of the other shaft by the crank mechanism.

  Each of the front and rear shafts 240, 241 is provided with a braking switching mechanism 60, and the operator simply presses the operation end 251 of the front operation tool 250F or the rear operation tool 250R to lock the wheels 11, 11. And unlocking can be repeated.

  In the above-described embodiment, the operation tools 250F and 250R are formed in a U-shape, but the present invention is not limited to this, and the operation tool has a single plate-like swing whose one end is connected to the shafts 240 and 241. It is composed of an arm part and a pedal part formed on the outer end part of the arm part, and the handle part is provided in the axial end part of the swing arm part on the front and rear sides with different vertical directions. The parts may be connected by a single link to constitute a crank mechanism. Alternatively, the handle may be a separate body from the operation tool, and may be independently attached to the shafts 240 and 241 with different vertical orientations, and may be rotatably connected by a link.

  Next, a description will be given of a caster braking mechanism 302 according to a third embodiment of the present invention. The caster braking mechanism 302 according to the present embodiment is configured so that the caster braking mechanisms 102 and 202 according to the first and second embodiments operate an operation unit for braking the wheels of the caster in the front-rear direction of the bottom 4 of the furniture 3. The difference is that it is provided in two places, but is provided not only in at least one of the front and rear directions but also around a body to be attached such as furniture, so that the operation unit can be easily approached from any position.

  As shown in FIGS. 13 and 14, the caster braking mechanism 302 according to the present embodiment is configured such that the furniture 303 as an attached body is connected to the left and right underframes 304A and 304B and the side frames 304A and 304B. , 304D. Casters 305A to 305D are respectively provided at the front and rear ends of the left and right underframes 304A and 304B via attachment members 306FL, 306FR, 306RL, and 306RR. The brake device 320 of the casters 305A to 305D has substantially the same structure as the brake device 20 of the casters 5A to 5D according to the above-described embodiment, and the upper end of the brake rod 22 protrudes on the turning shaft 13 so as to be movable up and down. To be placed.

  Actuating shafts 307 and 308 are pivotally supported on the rear-side attachment members 306RL and 306RR, respectively, on the rear side in the traveling direction F of the turning shaft 13 of the casters 305C and 305D. One end of an actuating member 342 is connected to each actuating shaft 307, 308 (see FIGS. 3A and 3B), and one end 307A, 308A of each actuating shaft 307, 308 is an attachment member 306RL, It protrudes inward from 306RR. The actuating member 342 has a swing end 345 that abuts against the upper end surface 21 of the brake rod 22 and swings integrally with the operating shafts 307 and 308 so as to push down the brake rod 22.

  A main operation portion 350 and branch ends 352 and 353 of the main operation portion 350 are connected to the rear left and right shafts 340A and 340B in the support 361, respectively, to the rear side horizontal frame 304D. An operation tool locking mechanism 360 is provided that regulates both directional swing end positions and holds the main operation unit 350 at each swing end position. The left and right shafts 340A and 340B are pivotally supported by the support tools 361 and 361, and one ends of the shafts 340A and 340B extend through the underframes 304A and 304B. Sub-operating portions 351A and 351B are provided on the externally extended ends 341A and 341B of the shafts 340A and 340B, respectively. Oscillation levers 309, 309, 310, 310 are provided between the base frames 304A, 304B of the shafts 340A, 340B and the supports 361, 361 and the protruding ends 307A, 308A of the operation shafts 307, 308, respectively. The connecting rods 311 and 312 are pivotally supported and connected to the other ends of the swing levers 309-310 and 309-310.

  In this way, the brake operation transmission mechanism 357 of the caster braking mechanism 302 is configured so that the operating shafts 307 and 308 are pivotally supported by the mounting members 306RL and 306RR, and the projecting ends 307A and 308A are moved from the mounting members 306RL and 306RR. The actuating member 342 having one end connected to the actuating shafts 307 and 308 is arranged so as to be able to abut on the brake rod (engaging member) 22 and is attached to the base frames (attached bodies) 304A and 304B. The shafts 340A and 340B having the main operation unit 350 are pivotally supported, and the shafts 340A and 340B and the operating shafts 307 and 308 are connected so as to be able to transmit motion to rotate the shafts 340A and 340B. , 308.

  Since the braking operation transmission mechanism 357 of the caster braking mechanism 302 according to the present embodiment is configured as described above, a pressing force is applied to any one of the main operation unit 350 and the sub operation units 351A and 351B. Then, when the braking device 320 and the operation tool lock mechanism 360 hold the wheel in a braking state, an external force is applied to restore one of the main operation unit 350 and the sub operation units 351A and 351B to the original position. The braking of the wheel is released. As described above, since the main operation unit 350 and the sub operation units 351A and 351B are provided around the furniture 303, even if the direction of the furniture 303 is constantly changed, the operator can move to the operation units 350, 351A, and 351B. It becomes easy to approach and work efficiency improves. In addition, since the operating shafts 307 and 308 of the braking device 320 and the braking operation transmission shafts 340A and 340B connected to the operating units 350, 351A and 351B are composed of two axes having different axes, the operating unit 350 , 351A and 351B can be provided at locations away from the casters 305C and 305D, and the degree of freedom in design can be increased.

  In the caster braking mechanism 302 according to the above-described embodiment, the operation tool locking mechanism 360 is used to perform braking and braking release operations by the main operation unit 350 and the sub operation units 351A and 351B, but the present invention is not limited thereto. Of course, instead of the operation tool locking mechanism 360, a brake switching mechanism 60 that constitutes a part of the operation switching mechanism 2 of the operating device according to the first embodiment may be used. . In this case, the operation can be performed from either the front or rear side, and the braking and release of the wheel can be performed only by repeating the pressing operation. In addition, the operating shafts 307 and 308 of the braking device 320 and the braking operation transmission shafts 340A and 340B connected to the operation units 350, 351A and 351B are composed of two axes having different axes, but the present invention is not limited thereto. It may be arranged on the same axis, or may be configured on the same axis, depending on the shape of the furniture (attached body) 303. Further, in the present embodiment, the rear casters 305C and 305D are braked, but the present invention is not limited to this. , 351A, 351B may transmit the external force received to the brake device 320 of the caster on the other side in the front-rear direction. Further, as in the above embodiment, a braking operation transmission mechanism 157 provided with the reverse movement device 171 may be provided so that the transmission of the braking operation is transmitted in the reverse direction.

  Next, a description will be given of a caster braking mechanism 402 according to a fourth embodiment of the present invention. The caster braking mechanism 402 according to the present embodiment is a caster braking mechanism 302 in which the horizontal frames 304C and 304D are connected to both front and rear ends of the base frames 304A and 304B of the furniture 303 to form a rectangular cart. In contrast, the attachment body 403 is an H-shaped carriage used in a facility such as a hospital or a beauty salon.

  That is, as shown in FIGS. 15 to 18, the caster braking mechanism 402 according to the present embodiment is connected to the left and right frame frames 404A and 404B and the frame frames 404A and 404B by retreating inward. An H-shaped attached body is formed by the horizontal frame 404C. Casters 405A to 405D are provided on the front and rear ends of the left and right underframes 404A and 404B, respectively, via attachment members 406FL, 406FR, 406RL, and 406RR. The brake device 420 of the casters 405A to 405D has substantially the same structure as the brake device 20 of the casters 5A to 5D according to the above-described embodiment, and the upper end of the brake rod 22 protrudes on the turning shaft 13 and is elastically urged to move up and down. To be placed.

  Actuating shafts 407 and 408 are pivotally supported by the front mounting members 406FL and 406FR, respectively, on the rear side in the traveling direction F of the pivot shaft 13 of the casters 405A and 405B. One end of an actuating member 442 is connected to each actuating shaft 407, 408 (see FIG. 17), and both end portions 407A, 407B, 408A, 408A of each actuating shaft 407, 408 are arranged on both left and right sides from the mounting members 406RL, 406RR. It is designed to protrude. The actuating member 442 has a rocking end abutting against the upper end surface 21 of the brake rod 22 and rocks integrally with the actuating shafts 407 and 408 so as to push down the brake rod 22.

  The horizontal frame 404C is connected to the main operation unit 450 and branch ends 452 and 453 of the main operation unit 450 with the shaft 440 in the support 461, respectively. An operating tool locking mechanism 460 that regulates and holds the main operation unit 450 at each swing end position is provided. The shaft 440 is pivotally supported by the support tools 461 and 461, and both ends are extended to protrude outside the frame frames 404A and 404B, respectively. Sub-operating portions 451A and 451B are provided on the externally extended ends 440A and 440B of the shaft 440, respectively. One end of swing levers 409 and 409 is connected to the shaft 440 between the left sub-operation unit 451A and the left support 461 and between the right sub-operation unit 451B and the right support 461, respectively. Further, the outer projecting ends 407A and 408A of the operating shafts 407 and 408 are connected to one ends of swing levers 410 and 410, respectively, and the other ends of the swing levers 409 and 409 on the shaft 440 side and the operating shafts 407 and 408. Connecting rods 412 and 413 are pivotally supported and connected to the other ends of the swing levers 410 and 410, respectively. For this reason, when the operation parts 450, 451A, 451B are operated, the operating force becomes the rotational power of the shaft 440 and is transmitted to the operation shafts 407, 408 through the connecting rods 412, 413, and the casters 405A, 405B are braked. The apparatus 420 is to be operated. The shaft 440, the swing levers 409, 409, 410, 410 and the connecting rods 412, 413 constitute a first braking operation transmission mechanism (braking operation transmission means).

  In the caster braking mechanism 402 according to this embodiment, the left and right operation shafts are provided between the operation shafts 407 and 417 and 408 and 418 supported by the left and right attachment members 406FL and 406RL and 406FR and 406RR, respectively. Transmission links 454 are provided for connecting 407 and 417 and the right operation shafts 417 and 418 so as to transmit motion. The transmission link 454 includes swing arms 455 and 456 whose one ends are connected to the inner projecting ends 407B and 408B of the front operation shafts 407 and 408, respectively, and the rear operation shafts 417 and 418. Swing arms 457 and 458, one end of which is connected to the ends 417B and 418B so as to be integrally movable, and both ends of the left swing arm 455 and 457 and the right swing arm 456 and 458 can be rotated by pins. And connecting rods 459 and 460 connected to each other. The transmission link 454 transmits the turning force of the shaft 440 given by the operation of the operation units 450, 451A, 451B from the front operation shafts 407, 408 to the rear operation shafts 417, 418 through the connecting rods 459, 460. It is like that. The transmission link 454 constitutes a second braking operation transmission mechanism (braking operation transmission means). As described above, in the caster braking mechanism 402 according to the present embodiment, the operations of the operation units 450, 451A, and 451B are transmitted to the braking devices 420 of all the casters 405A to 405D through the first and second braking operation transmission mechanisms. It has become so.

  As described above, in the caster braking mechanism 402 according to the present embodiment, the main operation unit 450 can be disposed at a position retracted rearward from the front casters 405A and 405B, so that the compactness can be achieved. In addition, since the sub-operation units 451A and 451B are provided on both the left and right sides of the furniture 403, the operator can change the direction of the furniture 403 constantly even if the orientation of the furniture 403 is constantly changed. , 451B, and the work efficiency is improved.

  In the caster braking mechanism 402 according to the above-described embodiment, the operation tool locking mechanism 460 performs the braking and braking release operations by the main operation unit 450 and the sub operation units 451A and 451B, but is not limited thereto. Instead of this, instead of the operating tool lock mechanism 460, a brake switching mechanism 60 that constitutes a part of the operation switching mechanism 2 of the operating device according to the first embodiment may be used. In this case, the operation can be performed from either the front or rear side, and the braking and release of the wheel can be performed only by repeating the pressing operation. In addition, the operation shafts 407 and 408 of the braking device 420 and the brake operation transmission shaft 440 connected to the operation units 450, 451A and 451B are composed of two shafts having different axes, but the present invention is not limited to this. Depending on the shape of the furniture (attached body) 403, the furniture (attached body) 403 may be arranged on the same axis or may be configured by the same axis. Further, in this embodiment, the rear casters 405C and 405D are also braked simultaneously with the front casters 405A and 405B, but the present invention is not limited to this, except for the second braking operation transmission mechanism. Only the first brake operation transmission mechanism may be used to brake only the front casters 405A and 405B. Further, as in the above-described embodiment, a braking operation transmission mechanism 157 provided with the reverse movement device 171 may be provided so that the transmission of the braking operation is transmitted in the reverse direction.

2 Brake switching mechanism of the braking device (operation switching mechanism of the operating device)
3 Furniture (fixed side)
5 Casters 20 Braking device (actuating device)
22 Brake rod (switching member)
40 shaft 42 actuating member 50 operation section

Claims (6)

An operation switching mechanism of an operating device that projects a part of a switching member that switches operation from an operating device that performs mechanical operation to the outside and switches the operation of the operating device by moving the switching member forward and backward,
A shaft having an operating portion on the fixed side is pivotally supported and elastically urged, and an operation member having one end attached to the shaft is arranged so as to be able to contact the switching member, and configured.
When the operation unit is pressed and operated by overcoming the bullet urging force by external force, the shaft is rotated and locked at a predetermined rotation angle. When the operation unit is pressed again by external force, the shaft is unlocked. An operation switching mechanism of the operating device characterized by returning to the original position,
A pin that is inserted between the pin and the swinging member, and a pin that is mounted so that the forward / backward movement means can be moved forward and backward by preventing the dropout in a through hole formed in parallel with the shaft on the swinging end side of the swinging member. And a first spring that protrudes by elastically biasing toward the support member side,
The engaging / disengaging means is provided on the support member so as to be swingable and has one side edge portion slidably contacted with the pin, and a working plate formed continuously on the one side edge portion and having a recessed portion for receiving the pin. And a second spring interposed between the action plate and the fixed side and elastically biasing the action plate toward the pin, and an action plate provided on the support member and biased toward the pin. It is configured with a stopper that regulates the swing position,
A concave portion of the working plate is formed by cutting out the end of one side edge portion, and is formed with an indented portion where the protruding end portion of the pin is locked, and a receiving end protruding outward toward the end of the one side edge portion. The projecting end portion of the pin detached from the end of the one side edge portion is received, and when the pin returns and returns in the return direction, it has a delivery portion that guides the pin to the notched portion,
The action plate is formed continuously from the notch, and when the pin locked to the notch is displaced in the direction opposite to the shaft biasing direction by an external force from the operation part, the action plate is removed. An operation switching mechanism for an operating device, characterized by having a separation guide path for guiding a protruding end portion of the pin and pushing the pin toward the swinging member side to disengage the pin from the action plate.   When the pin is separated from the notched portion of the action plate detachment guide path, the end surface of the protruding end of the pin is placed on the lower floor surface and the pin is guided along the wall surface from the inclined surface to the stepped portion, and this step The operation switching mechanism of the operating device according to claim 1, further comprising a guide inclined portion that is formed in conformity with a trajectory in a return direction of the pin and that is continuous with the guide and that guides the pin to the outside.   2. The fixed side is constituted by a mounted body having a caster provided with a rotatable wheel on its lower surface, and the actuating device is constituted by a braking device for braking the wheel of the caster. Switching mechanism of the actuator. An operation switching mechanism of an operating device that locks a wheel of a caster,
An oscillating member that is connected to a shaft that has an operating portion on an attached body to which a caster is attached to a lower surface, and that is connected to an actuator, and that rotates integrally with the shaft
A spring for biasing the swing member in a direction to push back when an external force is applied to the operation unit,
A locking member mounted on the swinging end side of the swinging member so as to be parallel to the shaft and freely movable back and forth ;
A locking member biasing spring that biases the locking member on the side of the support member that is attached to the mounted body and through which the shaft passes ;
Is supported pivotably to the preparative cylindrical body, the swinging member is rotated, and a disengagement means for swinging in contact with the locking member those,
When an external force is applied to the operating portion, the engaging / disengaging means locks the locking member at a predetermined swing angle to lock the shaft, and when an external force is applied to the operating portion again, the locking member is attached to the shaft. An operation switching mechanism for an operating device, wherein the operating member is displaced in a direction opposite to the biasing direction to release the locking of the locking member and return the shaft to its original position. An attached body comprising the operation switching mechanism of the operating device according to claim 4 . The mounting member according to claim 5, wherein the furniture, bedding, either of the truck.

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